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echo´Ø¿ôprint´Ø¿ô explode´Ø¿ô implode´Ø¿ô trim´Ø¿ô ltrim´Ø¿ô rtrim´Ø¿ô str_replace´Ø¿ô str_split´Ø¿ô str_shuffle´Ø¿ô strlen´Ø¿ô strtolower´Ø¿ô strtoupper´Ø¿ô ucfirst´Ø¿ô ucwords´Ø¿ô substr´Ø¿ô substr_count´Ø¿ô substr_replace´Ø¿ô |
substr-ʸ»úÎó´Ø¿ôsubstr´Ø¿ô¤Ïʸ»úÎóÃæ¤Î»ØÄê°ÌÃÖ¤«¤é¤Îʸ»úÎó¤òÊÖ¤¹´Ø¿ô¤Ç¤¹¡£°Ê²¼¤Ë»ÈÍÑÊýË¡¤ò¼¨¤·¤Þ¤¹¡£//substr("ÂоÝʸ»úÎó", "³«»Ï°ÌÃÖ", "¥Ð¥¤¥È");
$str = "PHP&CGI";
$str = substr($str, 4);
$str1 = substr("PHP&CGI", -1); //¡
echo $str;
echo $str1;
¾å¤ÎÎã¤Ç¤Ï°ú¿ô¤ËÊÑ¿ôstr(PHP&CGI)¤òÂоÝʸ»úÎó¤Ë»ØÄꤷ¡¢³«»Ï°ÌÃ֤ˤÏ4¤ò»ØÄꤷ¤Æ¤¤¤Þ¤¹¡£ ¤·¤¿¤¬¤Ã¤Æ¡¢Ê¸»úÎó"PHP&CGI"¤Î¤¦¤Á"PHP&"¤è¤ê¸å¤Ë¤¢¤ëʸ»úÎó CGI ¤¬¥Ö¥é¥¦¥¶¤Ë½ÐÎϤµ¤ì¤Þ¤¹¡£ ¡¤Ç¤Ï³«»Ï°ÌÃÖ¤Ë-1¤ò»ØÄꤷ¤Æ¤¤¤Þ¤¹¡£Éé¤Î¿ô¤ò³«»Ï°ÌÃ֤˻ØÄꤷ¤¿¾ì¹ç¤ÏËöÈø¤«¤é¿ô¤¨¤Æ²¿ÈÖÌܤÎʸ»ú¤«¤é¤È¤¤¤¦¤è¤¦¤Ë¤Ê¤ê¤Þ¤¹¡£ -1¤È¤¤¤¦¤Î¤ÏËöÈø¤«¤é1ÈÖÌܤÎʸ»ú¤È¤Ê¤ë¤Î¤Ç I ¤¬½ÐÎϤµ¤ì¤Þ¤¹¡£-3¤ò»ØÄꤷ¤¿¾ì¹ç¤Ï CGI ¤È¤¤¤¦»ö¤Ë¤Ê¤ê¤Þ¤¹¡£ substr¤ÇÃê½Ð¤¹¤ëʸ»ú¿ô¤ò»ØÄêsubstr´Ø¿ô¤Ï¥ª¥×¥·¥ç¥ó¤Ç"¥Ð¥¤¥È"¤ò»ØÄꤹ¤ë¤³¤È¤ÇÃê½Ð¤¹¤ëʸ»ú¿ô¤ò»ØÄꤹ¤ë¤³¤È¤¬²Äǽ¤Ç¤¹¡£(1¥Ð¥¤¥Èʸ»ú¤Î¾ì¹ç) °Ê²¼¤ËÎã¤ò¼¨¤·¤Þ¤¹¡£$str = "PHP&CGI";
$str = substr($str, -3, 2); //¡
$str1 = substr("PHP&CGI", 0, 3); //¢
echo $str;
echo $str1;
¢¤Ç¤Ï³«»Ï°ÌÃÖ¤Ë0¡¢¥Ð¥¤¥È¤Ë3¤ò»ØÄꤷ¤Æ¤¤¤ë¤Î¤ÇÀèÆ¬¤«¤é3ʸ»úÌܤޤÇÃê½Ð¤µ¤ì¤ë¤³¤È¤Ë¤Ê¤ë¤Î¤Ç¡¢ PHP ¤¬ÊÖ¤µ¤ì¤Þ¤¹¡£ substr´Ø¿ô¤ò»ÈÍѤ·¤Ê¤¤¤ÇƱ¤¸¤è¤¦¤ÊÃê½Ð¤ò¹Ô¤¦ÊýË¡¤¬¤¢¤ê¤Þ¤¹¡£°Ê²¼¤Ë¼¨¤·¤Þ¤¹¡£ $str = "PHP&CGI";
echo $str{0}.$str{1}.$str{2};
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